How to make offers on pre-1978 houses now (with new Lead Paint laws)?

[Bienes Raices]

With the new 2010 Lead Paint/Contractor law from EPA on houses built before 1978, costs are obviously going to go up for the person having the repairs done. But it's unclear to me how much extra this is going to cost the person buying the property over time. Has anyone come up with a method or strategy for buying these "old" properties under the new law? Or what about a way to estimate how much extra the rehab will cost? Thanks.